kou opened a new issue, #42087: URL: https://github.com/apache/arrow/issues/42087
### Describe the enhancement requested There are some build time warnings: https://github.com/apache/arrow/actions/runs/9449872504/job/26027172965?pr=42064#step:4:1110 ```text [64/82] Compiling Arrow ArrowArray.swift /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:28: warning: initialization of 'UnsafeMutablePointer<UnsafeRawPointer?>' results in a dangling pointer self.buffers = UnsafeMutablePointer(mutating: data) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: implicit argument conversion from '[UnsafeRawPointer?]' to 'UnsafePointer<UnsafeRawPointer?>' produces a pointer valid only for the duration of the call to 'init(mutating:)' self.buffers = UnsafeMutablePointer(mutating: data) ^~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: use the 'withUnsafeBufferPointer' method on Array in order to explicitly convert argument to buffer pointer valid for a defined scope self.buffers = UnsafeMutablePointer(mutating: data) ^ [65/82] Compiling Arrow ArrowArrayBuilder.swift /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:28: warning: initialization of 'UnsafeMutablePointer<UnsafeRawPointer?>' results in a dangling pointer self.buffers = UnsafeMutablePointer(mutating: data) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: implicit argument conversion from '[UnsafeRawPointer?]' to 'UnsafePointer<UnsafeRawPointer?>' produces a pointer valid only for the duration of the call to 'init(mutating:)' self.buffers = UnsafeMutablePointer(mutating: data) ^~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: use the 'withUnsafeBufferPointer' method on Array in order to explicitly convert argument to buffer pointer valid for a defined scope self.buffers = UnsafeMutablePointer(mutating: data) ^ [66/82] Compiling Arrow ArrowBuffer.swift /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:28: warning: initialization of 'UnsafeMutablePointer<UnsafeRawPointer?>' results in a dangling pointer self.buffers = UnsafeMutablePointer(mutating: data) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: implicit argument conversion from '[UnsafeRawPointer?]' to 'UnsafePointer<UnsafeRawPointer?>' produces a pointer valid only for the duration of the call to 'init(mutating:)' self.buffers = UnsafeMutablePointer(mutating: data) ^~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: use the 'withUnsafeBufferPointer' method on Array in order to explicitly convert argument to buffer pointer valid for a defined scope self.buffers = UnsafeMutablePointer(mutating: data) ^ [67/82] Compiling Arrow ArrowBufferBuilder.swift /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:28: warning: initialization of 'UnsafeMutablePointer<UnsafeRawPointer?>' results in a dangling pointer self.buffers = UnsafeMutablePointer(mutating: data) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: implicit argument conversion from '[UnsafeRawPointer?]' to 'UnsafePointer<UnsafeRawPointer?>' produces a pointer valid only for the duration of the call to 'init(mutating:)' self.buffers = UnsafeMutablePointer(mutating: data) ^~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: use the 'withUnsafeBufferPointer' method on Array in order to explicitly convert argument to buffer pointer valid for a defined scope self.buffers = UnsafeMutablePointer(mutating: data) ^ [68/82] Compiling Arrow ArrowCExporter.swift /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:28: warning: initialization of 'UnsafeMutablePointer<UnsafeRawPointer?>' results in a dangling pointer self.buffers = UnsafeMutablePointer(mutating: data) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: implicit argument conversion from '[UnsafeRawPointer?]' to 'UnsafePointer<UnsafeRawPointer?>' produces a pointer valid only for the duration of the call to 'init(mutating:)' self.buffers = UnsafeMutablePointer(mutating: data) ^~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: use the 'withUnsafeBufferPointer' method on Array in order to explicitly convert argument to buffer pointer valid for a defined scope self.buffers = UnsafeMutablePointer(mutating: data) ^ [69/82] Compiling Arrow ArrowCImporter.swift /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:28: warning: initialization of 'UnsafeMutablePointer<UnsafeRawPointer?>' results in a dangling pointer self.buffers = UnsafeMutablePointer(mutating: data) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: implicit argument conversion from '[UnsafeRawPointer?]' to 'UnsafePointer<UnsafeRawPointer?>' produces a pointer valid only for the duration of the call to 'init(mutating:)' self.buffers = UnsafeMutablePointer(mutating: data) ^~~~ /arrow/swift/Arrow/Sources/Arrow/ArrowCExporter.swift:67:59: note: use the 'withUnsafeBufferPointer' method on Array in order to explicitly convert argument to buffer pointer valid for a defined scope self.buffers = UnsafeMutablePointer(mutating: data) ^ ``` ```text [83/90] Compiling ArrowTests CodableTests.swift /arrow/swift/Arrow/Tests/ArrowTests/CodableTests.swift:101:17: warning: variable 'testClasses' was never mutated; consider changing to 'let' constant var testClasses = try decoder.decode(TestClass.self) ~~~ ^ let [84/90] Compiling ArrowTests IPCTests.swift /arrow/swift/Arrow/Tests/ArrowTests/CodableTests.swift:101:17: warning: variable 'testClasses' was never mutated; consider changing to 'let' constant var testClasses = try decoder.decode(TestClass.self) ~~~ ^ let ``` Can we treat build time warnings as errors in our CI to detect them easily? ### Component(s) Continuous Integration, Swift -- This is an automated message from the 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